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Патент USA US3090944

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May 21, 1963
F. L. MALTBY
3,090,936
ELECTRICAL CONNECTOR
Filed Dec. 24, 1959
FIG.
FIG.2
United States Patent 0 "ice
,
3,090,935
Patented May 21, 1963
1
2
3,090,936
of screws 7. The terminal strip 5 has a plurality of
transverse barriers 3 de?ning between them transverse
ELECTRICAL (IONNELCTQR
Frederick L. Maitby, 1417 Edge Hill Road, Abington, Pa.
Filed Dec. 24, 1959, Ser- No. 361,933
6 Claims. (Cl. 3319-—210)
grooves 9, each accommodating a stationary connecting
terminal 11. Each of the terminals 11 is provided with
a connecting lug 12 adapted to extend through the termi
nal strip 5 and the chassis 6 for electrical connection
on the reverse side of the chassis 6'. As shown, the ter
minals 11 are adapted to be detachably fastened to the
terminal strip '5 by means of the binder screws 13.
concerned with a type of connector known as a tanning
The barrier terminal strip 5 may be provided with any
strip for detachably connecting a plurality of electrical 10
number of terminals, but for the purpose of the present
conductors to a stationary terminal strip.
disclosure the terminal strip 5 has been shown as hav
A general object of the present invention is to provide
ing three terminals. Accordingly, the fanning strip 1 has
a new and improved fanning strip adapted for many uses
been illustrated as accommodating three conductors. It
and characterized by simplicity of design and ease of
‘The present invention generally relates to electrical
connectors. More specifically, the present invention is
15
assembly.
should be understood, however, that the fanning strip 1
Panning strips are utilized in electrical equipment to
simplify assembly, facilitate servicing, and to insure neat
and correct connections where a plurality of conductors
are involved. Commercially available ‘fanning strips,
may be made to accommodate any number of conductors
of the strip and thus are not adapted for use with solder
the heads of the ‘binder screws 13.
and thus insure neat, correct, and dependable electrical
connection of such conductors to a terminal strip.
As shown, each of the conductors 2, 3, and 4 is pro
however, require the soldering of the individual conduc 20 vided 'with spade-type connecting lugs 14, which may be
of the solderless type and adapted for engagement under
tors to the connecting lugs which are an integral part
less type connecting ‘lugs.
Accordingly, such fanning
strips can not be employed without sacri?cing the ad
vantages of automatic or semi-automatic fastening of the
connecting lugs to the conductors.
‘It is therefore a speci?c object of the present inven
tion to provide a fanning strip particularly adapted for
use with solderless type connecting lugs.
Another object of the present invention is to provide
a fanning strip adapted for use with barrier type terminal
The forward edge
of the fanning strip 1 is provided with plurality of verti
cal grooves or recesses 15 between each of the project
ing spade lugs which are adapted to accommodate the
transverse barriers 8 on the terminal strip 5 and permit
the positioning of the spade lugs 14 under the heads of
the binder screws 13..
To complete the connection
of the conductors 2, 3 and 4 to the terminal strip 5,
the binder screws 13 are screwed down on the spade lugs
14. When it is desired to disconnect the conductors 2,
3, and 4 from the terminal strip 5, it is only necessary to
loosen the binder screws 13 after which the fanning strip
A further object of the present invention is to provide
a fanning strip which permits the disconnecting of in 35 1 may be removed therefrom.
Referring now to FIGS. 3 and 4, the fanning strip 1
dividual conductors from a terminal strip without the
comprises a cover 16 and a base 17. As shown best in
necessity of disconnecting all of the conductors connected
FIG. 3, the base 17 comprises an elongated piece of
thereto by the ‘fanning strip.
insulating material having the plurality of transverse
In accordance with the present invention, there is pro
vided a fanning strip consisting of two pieces, a bottom 40 grooves 18 in its top surface. The base 17 may be made
of either a rigid insulating material, such as Bakelite, or
piece and a cover. The bottom portion comprises an
strips.
elongated strip of insulating material having a plurality
of transverse grooves each adapted to receive an electrical
conductor equipped with a connecting ing with the con
hard rubber; or it may be made of a ?exible insulating
material, such as nylon or polyethylene. Each of the
transverse grooves 18 is adapted to receive an electrical
conductor equipped with a connecting ing 14 with the
necting portion of the vlug projecting beyond the groove 45
spade portion of the lug projecting beyond the groove
and abutting against the side of the strip. The cover,
18 with the shoulders 19 of the spade portion abutting
which may either snap on or slide over the base, has a
against the front edge 21 of the base 17. For clarity,
pair of downwardly extending lips which grip the bottom
only the conductor 3 has been shown positioned in the
piece and hold the connecting lugs therein. Both pieces
of the tanning strip may be made of either a rigid insulat 50 base 17.
The spade lugs 14 which have been shown are of the
solderless type adapted to be connected to electric con
ductors by means of an automatic or semi-automatic
A better understanding of the present invention may
tool. Such a tool crimps two pairs of upwardly ex
be had from the following description when read with
tended ?anges 22 and 23 on a spade lug around a con
reference to the accompanying drawings of which:
55
ductor with the ?ange 23 gripping the insulated portion
FIG. 1 is a plan view of the fanning strip of the pres
24- of the conductor and the ?anges 22 gripping the strip
ent invention disconnected ‘from a barrier terminal strip;
or uninsulating portions 25 of the conductor. The for~
FIG. 2 is a top’ elevation of the tanning strip of the
ward edge 21 and the rear edge 26 of the base 17 taper
present invention connected to a barrier terminal strip;
FIG. 3 is a perspective view of the bottom portion 60 inward toward the bottom of the base .so that the base 17
has a trapezoidal cross-section. As -will be explained
of the fanning strip of the present invention;
in more detail hereinafter, this permits the cover 16 of
FIG. 4 is a perspective view, taken in partial sec
the fanning strip 1 to be attached to the base 17 by means
tion, of the fanning strip of the present invention show
ing material such as “Bakelite” or a ?exible insulating
material such as nylon or polyethylene.
of a dove~tail ?t.
ing the cover of the fanning strip in place.
Referring now to FIG. 4, the fanning strip 1 is shown
FIG. 5 is a perspective view of the farming strip of 65
with the cover 16 attached to the base 17. As shown,
the present invention with the top portion of the strip
the cover 16 has a pair of downwardly extended lips 27
made of a ?exible material.
and 28, the inner edges of which are tapered at 29 and
Referring now to vFIGS. 1 and 2, the numeral 1 indi
31 to mate with the tapered edges 21 and 216 of the base
cates a fanning strip in accordance with the present in
vention adapted to detachably connect a plurality of 70 17 . Accordingly, if the cover 16 is made of a rigid ma
terial, it is adapted to slide over the base 17 from one
conductors 2, 3, and 4 to a terminal strip 5. As shown,
the terminal strip 5 is mounted on a chassis ‘6 by means
end thereof; or if it is made of a ?exible material, it may
3,090,936
I
4
3
be snapped onto the base 17. The forward lip 27 of the
cover 16, in addition to holding the cover 16 onto the
base 17, also retains the lug-equipped conductors in the
grooves 1810f the base 17. To this end, the bottom edge
32 of the lip 27 is adapted to abut against the top surface
of the spade portion of the connecting lugs 14. When in
this position, the lugs 14 are prevented from being moved
in the forward direction ‘from the base 17 by either the end
of the conductors ‘or the crimped ?anges 22 of the lugs
‘abutting against the inner surface 29 of the lip 127. It
should also be noted that the lip 27 prevents the lugs 14
from rotating after being placed in the farming strip.v
This feature facilitates the alining of the connecting lugs
for insertion under the binder screws of a terminal strip.
ing beyond said groove and with a shoulder on said con
necting portion abutting against the side of said base, and V
a cover of insulating material for said base, said cover
having a pair of downwardly extending lips tapered to
mate with the tapering edges of said base in a dove-tail
?t and holding said cover on said base, the forward lip
on'said cover being adapted to rest on the connecting por
tions of the lugs projecting from said base and retaining
said lugs in said base.
.
2. Fanning strip as speci?ed in claim 1 wherein said
cover is made of a resilient insulating material.
3. A fanning strip adapted for detachably connecting
a plurality ‘of conductors equipped with connecting lugs
to ‘a barrier terminal strip comprising, in combination, a
Referring now to FIG. 5, there is shown a perspective 15 base of insulating material having a plurality of trans- ,
view of the fanning strip of the present invention which
verse grooves in its top surface each ‘adapted to receive an
illustrates the advantage of having the cover 16 made of a
electrical conductor equipped with a standard connecting
?exible insulating material. When the cover 16 is made
lug of the type secured to a conductor by conductor grip
of an insulating material, it is adapted to be snapped over
ping means extending upward from the lug to the rear
the 'base 17. Accordingly, the individual forward sec 20 of the connecting portion with the connecting portion of
tions of the cover 16, de?ned between the vertical recesses
‘said lug projecting beyond said groove with a shoulder
15, are adapted to be individually snapped over the base
of said connecting portion abutting against the side of said
I17. It is, therefore, possible to release a conductor from
base and a cover'of insulating material for said base, said
the base v:17 by unsnapping such individual portions of the
‘cover having a- pair of downwardly extending lips, the
cover 16 and pivoting them upward‘ about a hinge formed 25 inner surfaces of which are tapered to mate with the ta
by the resilient cover between the ends of the recesses 15
'pered sides of said base in a dove-tail ?t to hold said cover’
so that the forward lip 27 no longer prevents the cable
on said base, the forward lip on saidrcover extending
' and spade lug from being drawn forward out of its groove
downward to rest on the connecting portions of the lugs
in base 17. As will be obvious to‘ those skilled in the
projecting from said base and retain said lugs in said base,
art, this is particularly advantageous inasmuch as it per 30 said base and said cover having vertical recesses in their
mits an individual conductor to be disconnected from a
forward edges between said projecting lugs, said recesses
terminal strip without the necessity of removing all the
being adapted to accommodate the barriers on said termi
conductors connected thereto by the fanning strip.
By means of the novel construction described hereinbe
fore, it can be seen that the fanning strip of the present
invention is characterized by simplicity of design and
canrbe inexpensively manufactured. ‘In addition, the fan
ning strip of the present invention is exceptionally easy
to assemble for use, requiring only the placing of the in
dividual conductors in the appropriate grooves in the base
17 and the placing of the cover .16 on the base to hold
the conductors herein.
Although the fanning strip of the present invention has
been described as adapted for use with ‘a barrier-type ter
nal strip.
.
'
4. Fanning strip as speci?ed in claim 3 wherein said
cover is made of a resilient insulating material.
5. A fanning strip comprising an elongated base of in;
sulating material having a plurality of transverse grooves .
in the top surface thereof extending from the forward edge
to the rear edge thereof, a cover of insulating material
overlying said grooves and‘ having means to secure it to
said base, said cover and each of said grooves forming
means to hold a standard electrical connector of the class
including a connecting lug secured to an electrical con
due-tor by conductor gripping means extending upward
minal strip, it should be understood that it may be utilized 45 from the lug to the rear of the connecting portion with the
equally as well with terminal strips not having barriers sep
conductor extending out of the ‘rear of the groove and the
arating the individual terminals. When used with such
connecting portion of the lug projecting beyond and abut
a terminal strip it can be seen that there is no necessity
for including the vertical recesses 15 in its construction.
Still further, while the fanning strip of the present inven
tion has been shown in ‘connection with conductors hav
ing spade type connecting lugs it should also be under
ting against the forward edge of the base, said cover hav
ing a downwardly extending longitudinal lip overlying the
forward edge of said base member and spaced from the
bottom of said grooves a su?icient distance to engage and
receive therebetween the connecting portion of a standard
electrioal connector in ‘abutting relationship therewith, the
ductors having ‘other types of connection lips as for ex
connector being further engaged in said farming strip by
ample, a ring type connecting lip. In this respect, the 55 the engagement of said lip with the lug gripping means.
fanning strip of the present invention only requires that
6. A fanning strip as speci?ed in claim 5 which is
the connecting lugs used therewith have connecting por
adapted for use with a barrier terminal strip, said cover
tions wider than the transverse grooves 18 in the base 17
and said base having matching recesses in their forward
and a ?ange or obstruction on the conductor gripping por
edges to accommodate the barriers on said terminal strip.
tion which will prevent it from being withdrawn in the 60
forward direction from the groove =18 when the cover 16
References Qited in the ?le of this patent
is in place.
UNITED STATES PATENTS
Having described the present invention, that which is
stood that it is equally well adapted for use with con- ,
claimed as new is:
1. A fanning strip comprising an elongated base of in 65
sulating material, the forward and rear edges of said base
being tapered inward ‘toward the bottom of said base,
said base having a plurality of transverse grooves in its
top surface each adapted to receive an electrical conductor
equipped with a standard connecting lug of the type se 70
cured to a conductor by conductor gripping means extend
ing upward from the lug to the rear of the connecting
portion with the connecting portion of said lug project
1,858,196
2,221,710
Wermine ____________ __ May *10, 1932.
Johnson ____________ __ Nov. .12, 1940
_ 2,377,187
Schey ______________ __ May 29, 1945
2,502,860
Leithiser ______________ __ Apr. 4, 1950
2,814,787 ,
Jessup ______________ __ Nov. 26, 1957
2,828,474
Fox ________________ __ Mar. 25, 1958
'
FOREIGN PATENTS
592,619
Canada _________ __'____ Feb. 16, 1960
788,287
Great Britain _________ __ Dec. 23, 1957
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